Wood-preserving composition.



UNITED STATES PATENT oFFIcE.

GARDETON ELLIS, OI ION'ICLAIR, NEW JERSEY, ASSIGNOB TO COPPER OIL PRODUCT column, A CORPORATION OF NEWYOBK.

,woon-raasaavmc COMPOSITION.

No Drawing.

Patented May 2, 1911.

' To all wlwmit may'conem:'

Be it known that I, Cameron ELLIS, a citi zen of the United States, and resident of Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Wood-Preserving Composition, of which the following is a specification.

This invention relates to a composition for preserving wood and particularly relates to a composition? containin certain metallo-oramc compounds having antiseptical and un 'cidal properties, all asherelnafter descri ed and claimed.

The present invention has for its object the production of a composition for preserving wood that will have werful bacterial antiseptic and fungicida ro'perties, which will water-proof the wood satisfactorily and which'may be made from ordinary petroleum or asphaltum oils such as are easily and cheaply obtained in this country. p The composition involves the use of a preservative elementsuch as a copper .compound soluble in oil, or other metallo-or anic compound having. a high degree of so ubility in oil, and ossessing' powerful preserving properties. able for this application are zinc, mercury and arsenic. r i

In United States Patent No. 871,392 I have described a composition which involves the use of carbolate of cop er. I also mentioned in the specification 0 said patentthe use of resinate of copper. In asphalt-ic oils, which, are the ones best adapted for this use,

- -I have found the bodies referred to in the above-mentioned patent are either insufiiciently soluble, or are not sufiiciently permanent to give satisfactory results under severe service conditions.

The present invention in particular con cerns the use of metallo-organic compounds which are readily soluble in the cheap and easily obtained asphaltum or petroleum oils and which remain ermaneiitly dissolved therein and in condition to be ermanently effective as preservative materiali The com ounds which I have found especially usefulor such purposes are the copper bodies formed b uniting a cop r base with certain of the rubber res1ns,-an in particular with the liquidyrubber resin known as gu ule resin. The latter contains resin acids which ong the other metals suit combine readily with copper oxid, hydrate or carbonate, toform what may be termed a copper guayulate. This reaction is greatly facilitate by the resence of oleic acid and in practice I ma e a double combination of the guayule resin and oleic acid thus forming a sort of double copper oleate and gua ulate. This double compound may be rea ily made by heating five parts of copper carbonate with ten parts of ayule resin and five parts of oleic acid. T. e latter may be the commercial form known as red oil which is obtained by the autoclave saponification of oils.- Inasmuch as the stearate and.

and oily resins to a temperature of about 160 C. The copper slowly combines with the evolution of gas and the material foams a good deal during the tion so that a capacious ettle shou d be used in this operation. When the evolution of gas eriod of s evoluhas ceased the copper will befound largely incombination with the ayule resin and red oil in a condition which permits of its solution in ordinary asphaltum oil merely by warming until in complete solution. lVith the resinate or carbolate of copper it is possible to get into solution only a minute amount of copper under such conditions, while in the present invention it is possible to introduce several er cent. of copper without danger of precipitation of the copper compound on standing. This is an important consideration when wood is exposed to.

severe service conditions, as the decay of cellulose under these circumstances is very' rapid, unless a substantial proportion of copper is present.

The copper compound made as above, or I in any sultable manner, may be incorporated with the petroleum or asphaltum oil in a proportion to afford, say two or three per.

cent. or more of the copper body. This composition may then be used for impre nation of wood of every description, suc as ties,-piling, posts, mine timbers'and thelike. It ha's'the additional advantage over creosote in that by the use of a heavy oil,

such as asphaltic oil, the composition may sion of the iron and without fear be heated in the iron heating tanks to a. high temperature without danger of corroof explosion or danger of inflammation. Hence wear and tear on the ap aratus used for heating is minimized an fire risks are largely eliminated.

Another composition which ma be made in a similar manner is as follows: ive parts of copper hydrate and four arts of oxld of mercury are combined wit ten parts of guayule resin and fifteen parts of red oil. This mixture is reduced with 800 parts of heavy as haltic oil.

By asp ialtic oil, as used herein, I refer to those oils of asphaltic nature or origin, such as the malthas or mineral tars and the residue obtained through distillation .of crude petroleum oils containing asphaltic bodies. i

. The formulas herein given are illustrative and it will be evident that the proportions may be varied to secure special preservation 'particularly adapted for certain applications, and I do not wish to restrict myself,

under the present invention, tions hereinbefore set forth.

hat I claim is 4 1. A wood preserving composition, comprlsing copper guayulate and oleate in soluasphalticoil.

tion in heavg 2. A woo preserving composition, comto the proporprising copper guayulate and copper oleate OARLETON. ELLIS.

osition, comof a rubber oil. preserving composition, coma Witnesses:

NATHANIEL L. FosTnR, B RnELnA M. 

